Table 12: Fundamental frequency of vibration of DWCNTs with different boundary conditions between inner and outer tubes and for .

SS-SS inner
Cl-SS outer
SS-SS inner
Cl-Cl outer
SS-SS inner
Cl-Fr outer
SS-SS inner
Cl-Sl outer

024.56735.55824.56435.408
0.123.30433.68323.30333.684
0.220.34629.18720.34629.188
0.317.20424.50417.20424.504
0.414.53720.59714.53720.597
0.512.42617.54312.42617.543